form1.cs

一本很好的教材.C#开发者必备.内容全面,很难得哦.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace MenuSample
{
	/// <summary>
	/// Form1 的摘要说明
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.CheckBox checkBox1;
		private System.Windows.Forms.RadioButton radioButton1;
		private System.Windows.Forms.ContextMenu contextMenu1;
		/// <summary>
		/// 必需的设计器变量
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容
		/// </summary>
		private void InitializeComponent()
		{
			this.checkBox1 = new System.Windows.Forms.CheckBox();
			this.radioButton1 = new System.Windows.Forms.RadioButton();
			this.contextMenu1 = new System.Windows.Forms.ContextMenu();
			this.SuspendLayout();
			// 
			// checkBox1
			// 
			this.checkBox1.ContextMenu = this.contextMenu1;
			this.checkBox1.Location = new System.Drawing.Point(16, 8);
			this.checkBox1.Name = "checkBox1";
			this.checkBox1.TabIndex = 0;
			this.checkBox1.Text = "checkBox1";
			this.checkBox1.ThreeState = true;
			// 
			// radioButton1
			// 
			this.radioButton1.ContextMenu = this.contextMenu1;
			this.radioButton1.Location = new System.Drawing.Point(144, 8);
			this.radioButton1.Name = "radioButton1";
			this.radioButton1.TabIndex = 1;
			this.radioButton1.Text = "radioButton1";
			// 
			// contextMenu1
			// 
			this.contextMenu1.Popup += new System.EventHandler(this.contextMenu1_Popup);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(248, 37);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.radioButton1,
																		  this.checkBox1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void contextMenu1_Popup(object sender, System.EventArgs e)
		{
			// 清除菜单内容
			contextMenu1.MenuItems.Clear();
			// 增加一个状态为Checked的菜单项
			contextMenu1.MenuItems.Add("Checked",new System.EventHandler(this.Checked_OnClick));
			// 增加一个状态为Unchecked的菜单项
			contextMenu1.MenuItems.Add("Unchecked",new System.EventHandler(this.Unchecked_OnClick));
			// 判断是哪个控件
			if (contextMenu1.SourceControl == checkBox1)
			{
				this.contextMenu1.MenuItems.Add("Indeterminate", new System.EventHandler(this.Indeterminate_OnClick));
			}
		}

		protected void Checked_OnClick(System.Object sender, System.EventArgs e)
		{
			if (contextMenu1.SourceControl == radioButton1)
				radioButton1.Checked = true;
			else if (contextMenu1.SourceControl == checkBox1)
				checkBox1.Checked = true;
		}

		protected void Unchecked_OnClick(System.Object sender, System.EventArgs e)
		{
			if (contextMenu1.SourceControl == radioButton1)
				radioButton1.Checked = false;
			else if (contextMenu1.SourceControl == checkBox1)
				checkBox1.Checked = false;
		}

		protected void Indeterminate_OnClick(System.Object sender, System.EventArgs e)
		{
			if (contextMenu1.SourceControl == checkBox1)
				checkBox1.CheckState = System.Windows.Forms.CheckState.Indeterminate;
		}
	}
}